Senior Oracle Database Administrator Interview
Performance And Tuning, Oracle Rac, Dataguard, Database Architecture, Asm, Golden Gate Question(s) & Actual Evaluation
Please refer to the evaluation for more insight.
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Classification: Senior Oracle Database Administrator
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Topic(s): Performance And Tuning, Oracle Rac, Dataguard, Database Architecture, Asm, Golden Gate
Can you describe your experience with Oracle RAC? How do you handle node failures and ensure availability?
Candidate's Answer:Oracle RAC is high availability model and faster than traditional database. if one node get down - applications will get auto connected to available nodes without any disruption to on-going task. for the node failure there are many ways to handle it- first needs to check db level alert log then node level cssd and crsd logs, need to check interconnection using ping amd tnsping command.
Evaluation:Your answer touches on some key aspects of Oracle RAC and node failure handling, but it could be expanded to provide a more comprehensive response. Here’s the evaluation of your answer:
1. Content Understanding: You demonstrate a basic understanding of Oracle RAC as a high-availability solution and mention important elements such as automatic connection failover and the need to check logs. However, the statement "faster than traditional database" could be misleading; RAC's performance benefits derive from load balancing and resource sharing, rather than inherent speed.
2. Node Failure Handling: You identified the critical logs to check during a node failure, which is good. However, elaborating on specific steps taken after assessing those logs (like initiating failover procedures, using Oracle Clusterware for resources, or bringing the node back online) would provide further insight into your knowledge and experience.
3. Availability Assurance: While you mentioned automatic connection to available nodes, explaining how Oracle RAC achieves this (like using Oracle’s Fast Application Notification or TAF) would enhance your answer.
To improve your response, you might include:
- A brief overview of Oracle RAC architecture, emphasizing its clustering.
- Specific steps taken during node failures beyond just log checking, such as any incident response plans you follow.
- Mention any tools or scripts you use to streamline monitoring and recovery processes.
- Discuss performance tuning strategies in a RAC environment.
Overall, I would rate your answer 3/5. You covered basic concepts, but a deeper dive into technical details and recovery strategies would enhance your response significantly.